W7 will not start up after installation.

So, I've been having Vista for quite some time, and decided to switch to windows 7. I got my copy, and upgraded from my vista installation. After the upgrade, when everything was completed with the installation, it wouldn't get to the desktop. I get this error each time I'm past the login screen: The procedure entry point dwmhintdxupdate could not be located in the dynamic library user32.dll

I have tried to search for a fix all around the internet, but I can't seem to find any. There is very few people who seem to have this problem at all.

Please, please help! I have a lot of files I can't loose there, and if I have to format now, I have a hella lot of work ahead of me.
In advance, thank you.

If you have a retail copy, you paid for MS excellent tech support. They will get your through it.

There must be a way they can recover it. But you should always back up your files. Sorry.

Try install with boot from dvd and dont upgrade..if its work backup ur file in windowsold folder and do clean install

Yeah, I thought I'd just ask on forums a little first..

Doing a clean install isn't exactly what I wanted, but I'll have to do that if everything else fails, sadly..

i have seen this problem in someone else's computer when they upgraded to win7 from vista that had aurora as the screensaver. will you be able to change the screensaver ?

I've seen that post as well. But he seem to have Aurora.exe in top of the error box, where i have explorer.exe.. I doubt it's the same thing, but even if it was, I'm not sure how to change screen saver without explorer.. I can't enter control panel through Run command either..

then i guess reinstallation is the only way.

gregrocker said:

If you have a retail copy, you paid for MS excellent tech support. They will get your through it.

There must be a way they can recover it. But you should always back up your files. Sorry.

The fact it starts up to a specific error message makes it even more likely MS will know how to troubleshoot, roll back, or get in-place started up again.

They spend a fortune on the best tech support in the business. Issues they cannot fix are elevated to a research team. They can help you save your data, at least.

You paid for it with a retail key.

Do you get a black screen with a cursor on it?\

If so,tap Alt-Ctl-Del to open Task mananger and choose new task and type in explorer.exe.