gernuwa.sys registry cleanup on reboot
pcAnywhere 10.0 file descriptions
Could be that driver ,you could rename or replace it using recovery console.
File replacement
http://service1.symantec.com/support...d?OpenDocument
As you say it could be stalling on the next driver that you can't see.
I would contact symantec if you have pcAnywhere on that computer it could be
one of those software not compatible with sp2.
Best way to install sp2 is in clean boot. you just can't make a mistake with
this.
http://support.microsoft.com/default...b;en-us;310353