a few days ago i installed Win XP new after my PC smoked down.
Today i decide to install the Driver package from my Creative Audigy 2 ZS. I looked for good drivers and found it. After download i scanned it with AVAST and there was nothing found.
But by the install procedure Avast told me that there is a rootkit. So i brake the installation.
Well I personally would not use any third party modded drivers unless I have modified those myself or they came from a trusted source such as some dedicated moders forum. (Definitely not random crap from Hotlink, Rapidshare or whatever.)
To avoid malware, never install anything that does not have, at minimum, a valid digital signature purporting to be from a source you trust (e.g., Creative Labs themselves).
Plenty of malware will scan clean in antivirus/antimalware programs.