I have several apps that won't open, some are windows apps, and others are 3rd party.
So... what are these apps??
I recently loaded a different virus protection program than was originally on my computer...
What's the name of this new antivirus? Can you provide a link from where you downloaded it? Did you uninstall the original antivirus in the proper manner recommended by its developer? Some antivirus developers provide a cleanup tool that should be used when their antivirus is uninstalled. Not following the proper procedure can leave remnants of the previous antivirus which can cause conflicts with the new antivirus. If you provide the names of the current and previous antivirus programs we will try to advise you accordingly.
...and from some of my research, it looks like maybe the registry fix part of the program may have removed some files that I need?
Bleeping Computer DOES NOT recommend the use of registry cleaner. Registry cleaners and optimizers can damage your computer and may even make it unbootable. If your new antivirus has a registry cleaning component please do not use that feature. Please read: http://www.bleepingcomputer.com/forums/t/540335/what-is-the-best-windows-tune-up-program/?p=3424951
Whatever it is, I can't get into the advanced startup, no matter how fast I hit the buttons after starting.
The F8 key to get into Advance Startup Options is disabled by default in Windows 8 and 8.1 so it won't work. If you want to re-enable the F8 key then please refer to this article: http://www.bleepingcomputer.com/tutorials/enable-the-f8-key-in-windows-8/
I would like to reload windows, but my laptop didn't come with a disk. It's supposed to have a back-up installation on my backup drive, or be available from the support website, but I can't find it at either place.
Modern computer don't come with recovery disks any more. Instead, there should be a Recovery Partition on the hard drive from which you can restore your computer to factory condition.
In the case of your laptop, this can be achieved via a special feature called Lenovo OneKey Recovery which you should find on your laptop. Please refer to page 25 of the User Guide for your laptop. Remember, your computer will be restored to the state it was in when you bought it. Therefore, you should ensure back up all important information.
In Windows 8 and 8.1 you can also perform a Reset your computer which will basically achieve the same thing as the Lenovo OneKey Recovery feature. Please refer to this article on how to perform a Reset: http://www.bleepingcomputer.com/tutorials/how-to-perform-a-clean-install-of-windows-8/
As an alternative, you can also Refresh your computer. A Refresh will allow you to keep all your personal data, however, you will have to re-install all desktop programs and any apps you may have downloaded from the Windows Store. Please refer to this article on how to do a Refresh: http://www.bleepingcomputer.com/tutorials/reinstall-windows-8-using-refresh-your-pc/
As you can see, you have 3 things you can try.
Whichever you choose, Good Luck!
Edited by Agouti, 30 October 2014 - 01:11 PM.