Below is the report from ProcessXP: Everything loks fine to me. I clicked on the bad program and it kicked the CPU usage of Expolrer.exe to 97-100% (which tends to slows things down just a tad...). Beyond that, I didn't see any other processes that looked like they didn't belong.
(edited x2 - Opened the file through ProcessXP, and it didn't have any effect on anything. Just the normal "Can't Play File" error. When I closed Media Player, everything was cool. Based on these experiences, I'm going to torh that file!

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Process PID CPU Description Company Name
System Idle Process 0
Interrupts n/a 1 Hardware Interrupts
DPCs n/a Deferred Procedure Calls
System 4
SMSS.EXE 396 Windows NT Session Manager Microsoft Corporation
CSRSS.EXE 620 1 Client Server Runtime Process Microsoft Corporation
WINLOGON.EXE 644 Windows NT Logon Application Microsoft Corporation
SERVICES.EXE 688 Services and Controller app Microsoft Corporation
SVCHOST.EXE 888 Generic Host Process for Win32 Services Microsoft Corporation
SVCHOST.EXE 988 Generic Host Process for Win32 Services Microsoft Corporation
SVCHOST.EXE 1172 Generic Host Process for Win32 Services Microsoft Corporation
SVCHOST.EXE 1244 Generic Host Process for Win32 Services Microsoft Corporation
LEXBCES.EXE 1300 LexBce Service Lexmark International, Inc.
LEXPPS.EXE 1336 LEXPPS.EXE Lexmark International, Inc.
SPOOLSV.EXE 1344 Spooler SubSystem App Microsoft Corporation
avgamsvr.exe 1964 AVG Alert Manager GRISOFT, s.r.o.
avgupsvc.exe 176 AVG Update Service GRISOFT, s.r.o.
SVCHOST.EXE 240 Generic Host Process for Win32 Services Microsoft Corporation
LSASS.EXE 700 LSA Shell (Export Version) Microsoft Corporation
explorer.exe 1628 97 Windows Explorer Microsoft Corporation
hkcmd.exe 1716 hkcmd Module Intel Corporation
IntelMEM.exe 1724 Modem Event Monitor Application Intel Corporation
tfswctrl.exe 1732 Drive Letter Access Component Sonic Solutions
2portalmon.exe 1744 HomePortal Monitor Application by 2Wire Engineering 2Wire, Inc.
dlbkbmgr.exe 1780 Dell AIO Printer A920Button Manager Dell Computer Corporation
dlbkbmon.exe 1864 Dell AIO Printer A920Button Monitor Dell Computer Corporation
LVComS.exe 1828 LVCom Server Logitech Inc.
realsched.exe 1880 RealNetworks Scheduler RealNetworks, Inc.
avgcc.exe 1900 AVG Control Center GRISOFT, s.r.o.
mmtask.exe 1924 <Musicmatch System Tray Application> Musicmatch Inc.
procexp.exe 2456 Sysinternals Process Explorer Sysinternals
IEXPLORE.EXE 520 Internet Explorer Microsoft Corporation
(Edited to add Bold)