Vlk
3
Do I understand it correctly that you have boot problems on both Win98 AND WinXP?
It seems like a collision with other software to me… Could you please specify what software do you have installed? The most important are the low-level utilities, as these are most prone to collisions with other programs.
So far, avast! has a known incompatibility with Norton Antivirus and/or Internet Security 2003.
Vlk