Vista SP1 has crippled my PC!

Going round and round in circles, all support sources useless so far. Any help would be really appreciated.

3 Days ago I had a Compaq notebook (6720s) that was working OK, although USB functionality was pretty random.

Then I tried to install Vista SP1 as offered by Windows Update. The install failed. 2 different System Restore points also fail.... Terrific.

System no longer shows DVD drive in My Computer or Computer Management, but it shows in Device Manager as not working, no drivers. My printer (USB), no longer works, nor my external hard drive, (USB), nor apparently anything on a USB port. Everything else seems OK, apart from System Restore of course.

I've tried the Filters fix that everyone seems to suggest. No good.

Microsoft will not give me their much-trumpeted free support on SP1 as my Windows (Home Basic), is OEM. Hewlett Packard just suggest doing a system restore using F11 on start up. Tried that, and guess what, no restore points shown....

Catch 22, 44, and 66 as far as I can see.

No idea where to go next. I've tried some other stuff, but if anyone can give me a steer to at least try thinking about other directions.

Thanks in advance.

Andy

.

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