Bass.dll deleted when I restart Windows (1 Viewer)

[KFaust]

TV-Server Version: none
MediaPortal Version: 1.0 RC3
MediaPortal Skin: Indigo
Windows Version: Win XP + SP3
CPU Type: AMD Athlon X2 4850e
HDD: Seagate 250 GB SATA
Memory: 2 * 1Go Crucial PC6400
Motherboard: Gygabyte GA-MA78GM S2H
Video Card: integrated (AMD 780G)
Video Card Driver: AMD 780G driver
Sound Card: integrated
Sound Card Driver: AMD 780G Driver
TV Card: none
MPEG2 Video Codec: Power DVD 6
MPEG2 Audio Codec: Power DVD 6
h.264 Video Codec: ffdshow
Satelite/CableTV Provider: none
HTPC Case: CoolerMaster CM-260
Cooling: Air
Power Supply: Fortron 450 W
Remote: iMon
TV: LG 37' LCD
TV - HTPC Connection: DVI

Hi!
My problem is when I restart my PC, everytime the file bass.dll is missing.
It doesn't happens when I hibernate the PC, only if I turn off or restart the computer by the 'Start' menu.
And when I'm back on Windows, Mediaportal will launch with no problem, but the file bass.dll is missing so I can't play the videos.
First time it happened, I had to reinstall MP, but now I've saved the bass.dll and I copy it from my backup to the MP folder.
Can somebody help me with this problem.

 

[Paranoid Delusion]

Your Virus checker has a thing about bass, report this to them, if there definitions were upto date should not show this.

This started happening with various antivirus software about 3-4 months ago.

 

[KFaust]

Thanks, I'll check this out