Several Problems with Build 5160

Just upgraded today and faced several problems (MBP 17" running XP):

1. Parallels Tools: it won't install; nor will the old one uninstall; nor is the .iso image working for installing - so, no coherence, sounds don't work

2. IE 7: some websites that worked before now totally do not

3. Sound: probably a Parallels Tools issue: the sound doesn't work anymore in Windows XP

So, i am uninstalling 5160 and reinstalling the previous version