Posted 05 May 2005 - 10:31 PM
I have no experience with F-secure, but if you think this is slowing down your computer to the point where you cannot do anything, then test this by turning it off. If you computer regains some robustness, then you should consider using another antivirus. Many other applications that launch on start up also contribute, each in their own way, to lack of system resources; a smart move would be to review these and kill any that you really do not need (MS Office, RealPlayer, for example).
As to your second problem, try running Ad-AwareSE (and Spybot, if it is installed) in Safe Mode (see the tutorial for instructions for using safe mode); this prevents many applications from accessing files which are therefore "pretected" under normal circumstances by the Windows operating system. It MAY be necessary, in addition, to disable system restore (in case the nasties are hiding themselves in those protected files); do this as a last resort, since you will lose all saved restore points.
If you want a good, free Antivirus, I can recommend AVG.
Whereof one cannot speak, thereof one should be silent.