Antivirus scan does not want to run

[freedon]

this is an old Toshiba laptop, pentium2 something with 64MB ram and 5GB hdd and win2k pro spanish

I never saw problems, but the owner told me that his running programs would sudenlly close and some wierd errors would appear.

I first made a spyware scan with ad-aware 6 with latest update, then I ran symantec latest virus removal tools [fixSbigF, fixDumaru, fixWelch, fixblast, fixwinsh] only found 2 (welch & blaster)

Then I installed Antivirus (below), SP4, blaster patch, IEsp1 and updates created after sp4

This person did have an antivirus, norton coporate 8, but never installed it (don´t know why..). After each installed updates I tried to scan with the antivirus, but after 8 seconds it would say the scan had completed, even in safe mode I get the same thing.

How can I make it work? I´ve never seen this problem, how about online virus scans?

*Updated Information*