I'm pretty sure the game was installed before, and that I removed all traces of it (there isn't even an entry in my registry). What's going on? Is there a cure? I'm a computer illiterate, but here's what dxdiag has to say. Thanks in advance for your help.
Spoiler
Operating System: Windows 7 Home Premium 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.120830-0333)
Language: English (Regional Setting: English)
System Manufacturer: Dell Inc.
System Model: Inspiron 1545
BIOS: Phoenix ROM BIOS PLUS Version 1.10 A14
Processor: Pentium® Dual-Core CPU T4500 @ 2.30GHz (2 CPUs), ~2.3GHz
Memory: 4096MB RAM
Available OS Memory: 4056MB RAM
Page File: 1964MB used, 5102MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7601.17514 64bit Unicode
Language: English (Regional Setting: English)
System Manufacturer: Dell Inc.
System Model: Inspiron 1545
BIOS: Phoenix ROM BIOS PLUS Version 1.10 A14
Processor: Pentium® Dual-Core CPU T4500 @ 2.30GHz (2 CPUs), ~2.3GHz
Memory: 4096MB RAM
Available OS Memory: 4056MB RAM
Page File: 1964MB used, 5102MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7601.17514 64bit Unicode