A few weeks ago while my teenagers were on Youtube they acquired a nasty little trojan that was said to change the registry, stopped Windows defender and corrupted those files, it also made it so that opening any programs you had to right click and run as administrator. It corrupted Avast as well as who knows what else. Getting the computer into safemode was difficult and opening Hijackthis was a bear...I had to change the file names and move them to get them to open and run. I did delete from Hijackthis a couple of toolbars and R0 redirects that were added and ran Malwarebytes in safemode. Nothing had been downloaded prior...I did eventually find a way to remove Avast and reinstall a fresh version but it took some doing and only installed after I removed the toolbars and redirects.
Helpful others who aren't so patient decided to help not realizing that it needed "real" help and threw away my notes with trojans and error specifics in addition to making some "informed" changes...I really don't know what they did because they didn't document anything. From what they said they found 27 other trojans on here as well. I apologize ahead of time for that and hope even so someone can help???
The one item that I do still have specifics on is this Hijackthis entry...
010 - Broken Internet Access because of LSP Provider c:\windows\system32\nwprovau.dll
Anyway...if anyone can point me in the right direction I'm patiently waiting to follow your directions. Thank you in advance for your help