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Black Screen w/ blinking cursor, system recovery failing.
Hey, I have an HP desktop, model: HPE-150f. I'm running Windows 7 64-bit. Earlier this morning, I booted up, windows was working and I began browsing the Internet for a few minutes. With no warning, my computer restarted and after the blue HP splash screen, I was greeted with a black screen with a blinking cursor in the top-left corner. I powered it down (whenever it is on now, a press of the power button instantly turns it off, previously I had to hold it). I'm unable to access safe mode or the system recovery option on the slplash screen. I am, however, able to access the boot menu, diagnostics and setup options on the splash just fine. Running the HP diagnostic tool yielded no errors.
I burned a repair disk on another computer and accessed the recovery options. Startup repair encountered no problems and told me to unplug any new devices, but only the factory mouse/keyboard are currently plugged in. There were only 5 restore points (and a 6th "undo" option from yesterday) and all of these are currently failing with the error code: 0x800700b7. There is no system image recovery point.
As far as recent activity which could help in discovering the problem, Malwarebytes has been claiming suspicious activity from an "svchost.exe" and upon a scan, apparently found and deleted the issue, restarted the computer, whereupon a disk check took place. I continued using my computer for awhile after and Malwarebytes continued to claim it was blocking suspicious IPs via "svchost.exe". Auto-update tried to restart my computer but I postponed and shut down for the night some time later. This morning, as mentioned, I was able to log-in fine until it automatically restarted on me with no warning. Not sure if this has any relation, but it can't hurt to share.
I've been scouring google searches for a few hours now and have seen some similar and exact issues from others, but the exact matches don't seem to have any solutions. Also, my HP warranty is up and they want $60 just to try and diagnose a problem via phone support.
Sorry for the long read, I wanted to cover as many bases as possible. I'm not really adept with computers, but if anyone has any troubleshooting tips or advice, it would be greatly appreciated. All I can really do is access the system recovery options and the BIOS. I do not have an installation disc available to me currently.