I can work for about 2 minutes before it reboots. I was able to install the drivers
through safe mode. HP has a program that checks for bad drivers but it won't run in Safe Mode, and the computer does not stay on long enough to run it.
I'll try the clean install suggestion. Our "victim" has very little data to save - just some address book entries, a few files and almost no other software installed, except for Works, which she doesn't use, and Adobe Reader.
I'm sure part of the adware stuff that Malwarebytes found was due to her downloading "free" screensavers.
The laptop is about 5 years old; I'm not a fan of HP but this one has been decent and so far,and has not overheated. That's probably because she hardly uses it.
I'll post what happens.