I've looked around the forums these past few days, trying to find anyone having a problem similar to the one I've detailed below. Unfortunately I only found slightly similar issues and used their problems/resolutions to check against the state of my own install (making sure I wasn't using conflicting mods or mismatched patches).

The problem: Oblivion freezes and says "Oblivion has stopped responding" in the task manager, but doesn't crash to desktop per se. The frame just remains still and I have to CTRL+ALT+DEL out of it. This occurs in both indoor and outdoor cells, in a wide variety of locations, and at no particular time into my gameplay session. Action sounds stop playing, but background noise, such as wind in a ruin continues playing until I close the program.

This freeze seems to happen most during the onset of combat, like when I'm spotted and the enemy is getting ready to attack. I tried sequentially disabling Deadly Reflex, FormIDFinder (I thought some weird button press combo might be causing the issue), Streamline, and OSR to no avail. The error also occurs in a new game. I thought that Mighty Magick Reborn might be suspect as well, if there was some script problem when enemies cast buffs as combat starts, but I wanted to ask about the problem here before I tore my whole install apart and made things worse.

Now, I read that weOCPS is not recommended because of the performance decrease that comes with it, but I tried it out tonight for troubleshooting's sake. In testing, I found that when the freeze occurred, I was able to press ESC or another button to resume action in the game, but no "system sound" or message popped up to let me know that it prevented a crash. Similarly, no error log for weOCPS popped up in my install directory.

I plan to keep testing with weOCPS in place, but if anyone has suggestions or questions I'd greatly appreciate the guidance.

Active Mod Files:00  Oblivion.esm01  ScreenEffects.esm02  All Natural Base.esm  [Version 0.9.9.5]03  Francesco's Leveled Creatures-Items Mod.esm04  Francesco's Optional New Items Add-On.esm05  Cobl Main.esm  [Version 1.72]06  Oscuro's_Oblivion_Overhaul.esm  [Version 1.34]07  Mart's Monster Mod.esm  [Version 3.7b3p3]08  Enhanced Daedric Invasion.esm09  TamrielTravellers.esm  [Version 1.39c]0A  FCOM_Convergence.esm  [Version 0.9.9a7]0B  Armamentarium.esm  [Version 1.35]0C  Artifacts.esm  [Version 1.1]0D  Better Cities Resources.esm0E  Progress.esm  [Version 2.2]0F  HorseCombatMaster.esm**  TNR ALL RACES FINAL.esp**  TNR - ShiveringIsles.esp10  Unofficial Oblivion Patch.esp  [Version 3.2.10]11  UOP Vampire Aging & Face Fix.esp  [Version 1.0.0]12  Oblivion Citadel Door Fix.esp13  DLCShiveringIsles.esp14  Unofficial Shivering Isles Patch.esp  [Version 1.4.0]15  Better Cities .esp16  Francesco's Optional Chance of Stronger Bosses.esp17  Francesco's Optional Chance of Stronger Enemies.esp18  Francesco's Optional Chance of More Enemies.esp19  Francesco's Optional Leveled Guards.esp++  Francesco's Dark Seducer Weapons Patch.esp++  FCOM_Francescos.esp  [Version 0.9.9]++  FCOM_FrancescosItemsAddOn.esp  [Version 0.9.9]1A  FCOM_FrancescosNamedBosses.esp  [Version 0.9.9]1B  Fran Armor Add-on.esp1C  Fran_Lv30Item_Maltz.esp1D  FranOBSEConfig.esp  [Version 0.5]1E  All Natural - Real Lights.esp  [Version 0.9.9.5]1F  All Natural.esp  [Version 0.9.9.5]20  All Natural - SI.esp  [Version 0.9.9.5]21  Enhanced Water v2.0 HD.esp++  Enhanced Water v2.0 HD - SI Addon.esp  [Version 0.1]22  Side's EAX Control.esp23  Storms & Sound.esp24  WindowLightingSystem.esp25  Extended Death Camera.esp26  RAEVWD Cities.esp  [Version 1.8]27  RAEVWD New Sheoth.esp  [Version 1.7]28  RAEVWD Imperial City.esp  [Version 1.8]29  Living Economy.esp2A  Living Economy - Items.esp2B  Cutthroat Merchants.esp2C  DLCHorseArmor.esp2D  DLCOrrery.esp2E  DLCVileLair.esp2F  DLCVileLair - Unofficial Patch.esp  [Version 1.0.5]30  DLCMehrunesRazor.esp31  DLCMehrunesRazor - Unofficial Patch.esp  [Version 1.0.4]32  DLCSpellTomes.esp**  Armamentium female.esp33  DLCThievesDen.esp34  DLCThievesDen - Unofficial Patch.esp  [Version 1.0.5]35  KDCircletsOOOOptimized - NPC Equip.esp  [Version 1.2]++  FCOM_KDCircletsOOOOptimizedNPCEquip.esp  [Version 0.9.9]36  ExnemRuneskulls.esp++  FCOM_ExnemRuneskulls.esp  [Version 0.9.9]37  Slof's Oblivion Robe Trader.esp38  Cobl Glue.esp  [Version 1.72]39  Bob's Armory Oblivion.esp3A  FCOM_BobsArmory.esp  [Version 0.9.9]3B  Loth's Blunt Weapons for Npcs.esp++  FCOM_LothsBluntWeapons.esp  [Version 0.9.9]3C  Oblivion WarCry EV.esp3D  FCOM_WarCry.esp  [Version 0.9.9]3E  Oscuro's_Oblivion_Overhaul.esp  [Version 1.34]++  ArmamentariumLLVendors.esp  [Version 1.35]3F  ArmamentariumArtifacts.esp  [Version 1.35]40  OOO 1.32-Cobl.esp  [Version 1.72]++  FCOM_Cobl.esp  [Version 0.9.9]41  Mart's Monster Mod - Additional Enemy NPC Vars.esp  [Version 3.7b3p3]42  FCOM_Convergence.esp  [Version 0.9.9]43  FCOM_RealSwords.esp  [Version 0.9.9]44  Mart's Monster Mod - Extra Wounding.esp  [Version 3.7b3p3]++  Mart's Monster Mod - Looting NPCs & Creatures.esp  [Version 3.7b3p3]++  Mart's Monster Mod - No Giants.esp  [Version 3.7b3p3]++  Mart's Monster Mod - Less Bone Loot.esp  [Version 3.7b3p3]45  Mart's Monster Mod - Dungeons of MMM.esp  [Version 3.7b3p3]46  Mart's Monster Mod - Gems & Gem Dust.esp  [Version 3.7b3p3]47  Mart's Monster Mod - Farm Animals.esp  [Version 3.7b3p3]++  Mart's Monster Mod - Slof Horses Complete.esp  [Version 3.7b3p3]++  Mart's Monster Mod - Diverse Runeskulls Loot G&GD.esp  [Version 3.7b3p3]++  TamrielTravellerAdvScript.esp  [Version 1.39c]48  TamrielTravellers4OOO.esp  [Version 1.39c]49  TamrielTravellersItemsCobl.esp  [Version 1.39c]++  FCOM_TamrielTravelers.esp  [Version 0.9.9]++  FCOM_DiverseGuardUnity.esp  [Version 0.9.9]++  FCOM_BobsGuardUnity.esp  [Version 0.9.9]**  FCOM_Archery.esp++  FCOM_ArcheryArmamentarium.esp  [Version 2]++  FCOM_ArcheryRealSwords.esp  [Version 2]**  FCOM_FriendlierFactions.esp  [Version 0.9.9]4A  FCOM_MoreRandomSpawns.esp  [Version 0.9.9]4B  FCOM_MoreRandomItems.esp  [Version 0.9.9]++  ArmamentariumLL4OOO.esp  [Version 2.01]++  ArmamentariumLLMagicOOO.esp  [Version 1.35]++  OOOLivingEconomyWornRebalance.esp++  MMM-Cobl.esp  [Version 1.69]4C  Artifacts.esp  [Version 1.1]++  Artifacts - ArmaCompleteAddon.esp  [Version 1.0]4D  DLCBattlehornCastle.esp4E  DLCBattlehornCastle - Unofficial Patch.esp  [Version 1.0.4]4F  DLCfrostcrag.esp50  FrostcragRebornCobl.esp51  Knights.esp52  Knights - Unofficial Patch.esp  [Version 1.0.9]53  Mighty Umbra.esp54  MannimarcoRevisited.esp55  MannimarcoRevisitedOOO.esp  [Version 0.1]56  Mart's Monster Mod - City Defences.esp  [Version 3.7b3p3]++  FCOM_MightyUmbra.esp  [Version 0.9.9]++  FCOM_SlofsRobeTrader.esp  [Version 0.9.9]57  Enhanced Daedric Invasion.esp++  FCOM_EnhancedDaedricInvasion.esp  [Version 0.9.9]58  xuldarkforest.esp  [Version 1.0.4]59  xulStendarrValley.esp  [Version 1.2.2]5A  xulTheHeath.esp5B  XulEntiusGorge.esp5C  xulFallenleafEverglade.esp  [Version 1.3.1]5D  xulColovianHighlands_EV.esp  [Version 1.2.1]5E  xulChorrolHinterland.esp  [Version 1.2.2]5F  xulBeachesOfCyrodiilLostCoast.esp  [Version 1.6.4]60  xulBravilBarrowfields.esp  [Version 1.3.2]61  xulLushWoodlands.esp  [Version 1.3]62  xulAncientYews.esp  [Version 1.4.2]63  xulAncientRedwoods.esp  [Version 1.6]64  xulCloudtopMountains.esp  [Version 1.0.3]65  xulArriusCreek.esp  [Version 1.1.3]66  xulPatch_AY_AC.esp  [Version 1.1]67  xulRollingHills_EV.esp  [Version 1.3.2]68  xulPantherRiver.esp69  xulRiverEthe.esp  [Version 1.0.2]6A  xulBrenaRiverRavine.esp  [Version 1.0.2]6B  xulImperialIsle.esp  [Version 1.6.3]6C  xulBlackwoodForest.esp6D  xulCheydinhalFalls.esp  [Version 1.0.1]6E  xulAspenWood.esp  [Version 1.0.1]6F  xulSkingradOutskirts.esp++  FCOM_UnofficialFranArmorAddon.esp  [Version 0.9.9]70  Harvest [Flora].esp  [Version 3.0.0]++  Harvest [Flora] - Shivering Isles.esp  [Version 3.0.0]++  Harvest [Flora] - DLCVileLair.esp  [Version 3.0.0]71  Harvest [Flora] - DLCFrostcrag.esp  [Version 3.0.0]72  DropLitTorchOBSE.esp  [Version 2.4]73  P1DkeyChain.esp  [Version 5.00]74  Enhanced Vegetation [125%].esp75  Storms & Sound - Better Cities.esp76  Toggleable Quantity Prompt.esp  [Version 3.1.1]77  Quest Award Leveller.esp++  Quest Award Leveller - Battlehorn Castle.esp++  Quest Award Leveller - Vile Lair.esp++  Quest Award Leveller - Mehrunes Razor.esp++  Quest Award Leveller - Knights of the Nine.esp78  Skip Tutorial.esp79  Mighty Magick - Core.esp  [Version 1.2]7A  Mighty Magick - Magicka Pool Progression.esp  [Version 1.2]++  Mighty Magick - Sigil Stones.esp  [Version 1.2]7B  Mighty Magick - Restore Magicka Potions [OOO].esp  [Version 1.2]7C  attack and hide medium v2.1.esp7D  Deadly Reflex 5 - Timed Block and 250% damage.esp7E  DeadlyReflex 5 - Combat Moves.esp7F  ProgressGSD.esp  [Version 2.0]80  ProgressMBSP.esp  [Version 2.0]81  ProgressSBSP.esp  [Version 1.0]82  ProgressRBSP.esp  [Version 1.0]83  ProgressRacial.esp84  ProgressArmorer.esp  [Version 1.0]85  ProgressMercantile.esp  [Version 1.11]86  Let There Be Darkness - Cyrodiil + SI.esp87  Let There Be Darkness - Knights.esp88  Let There Be Darkness - Mehrunes Razor.esp89  Atmospheric Loading Screens - No Text.esp8A  Ethereal - Eyes.esp8B  Better Cities - Full City Defences.esp8C  Better Cities Full.esp8D  Better Cities - Unique Landscape Barrowfields.esp8E  Better Cities - Unique Landscape Chorrol Hinterland.esp8F  Better Cities - Unique Landscape Cheydinhal Falls.esp90  Better Cities - Unique Landscape Skingrad Outskirts.esp91  Better Cities - VWD of the IC.esp92  Better Imperial City.esp93  Better Cities - COBL.esp  [Version 2]++  [GFX]_Initial_Glow-all.esp++  Detect Life Blue Shader.esp++  Real Lava 1.3.esp94  ScreenControls.esp**  All Natural - Indoor Weather Filter For Mods.esp  [Version 0.9.9.5]95  AddisHeadhunterMod EV.esp96  Bashed Patch, 0.esp97  FormID Finder4.esp98  Oblivion Graphics Extender Support.esp  [Version 0.2]99  nGCD.esp9A  Streamline 3.1.esp