used Pc Angel my self.I phoned Eveshams tech dept this morning,they used Pc Angel and the recovery disc to check for corrupt files in the OS.
From what he said ,they use this software to correct most software related issues.
Read somewhere that Pc Angel takes a snap shot image of the Registry on start up.
Still not sure if my problem has been addressed with it's use.Time will tell.
If Evesham pre-install the software,it must be a reliable diagnostic tool.
I hope this was of help?.