vista boot problem

[madrat]

hey there chaps

Have a begger of a prob got a comp now this is the first vista os i have delt with here that had a malicis ad on it so have removed that and computer booted normaly so i then cleaned the registry and again it booted normaly then i did a reg defrag and the comp just keeped going to the first screen on where you chose setup or recovery so i did the dignostic and every thing says 100% so i did the boot recovery and all good but the last came up with

osnotinstualled

no too me that looks like it has unistalled vista but how and why some help would be most excellint

[Dalo Harkin]

So everything was ok until you ran a defrag? what software did you use for the defrag?

 

The problem with defrags is that it moves files around the HDD, it only takes a few moved to a bad sector on the HDD and your stuck..

 

If you keep pressing F8 on startup it should bring up a black screen similar to the POST screen that will allow you to boot to safe mode, last known good configuration etc.

 

Try the last known good configuration and see if it gets you back to the OS

[RandyL]

A registry cleaner can also cause all sorts of problems. But since you booted once after hopefully that's not the problem. Do as Dalo says and see if you can get into safe mode.