High CPU usage (100%) on Random applications. (Applications using 50%)

Hi Inquixitor and welcome to Seven Forums!

Same problems if you boot to Safe Mode? If that helps try this as a next step:
Troubleshoot Application Conflicts by Performing a Clean Startup

*ProcessExplorer (and all solutions related to it)
Including enabling VirusTotal check from the options menu? That will check all running processes against 50+ antivirus products. Start Process Explorer as Administrator so it can check system processes too.

Instead of killing a process from Task Manager it's better to use Process Explorer and first Suspend the process, then kill it. In case of malware infection this reduces it's chances to automatically restart the process when you kill it.

The VirusTotal results are only showing for a few of your processes. You should start Process Explorer as administrator so it can check all processes including those running as system, services etc. Or you can go to the File menu and select "Show Details for all processes".

Process Explorer can't remove infections, only show the results from VirusTotal. If only ONE anti-virus detected something it's not necessarily an infection. It's likely a false positive, a wrongly detected "infection" by a specific anti-virus product. A detection from several anti-virus products are more likely a true infection.
The purpose of checking VirusTotal with Process Explorer is to perhaps get a first clue IF you have lots of infections. Because it checks with more than 50 different AV's it's a very fast way to get an first overall picture of all the running processes.

*I made sure to uninstall other anti-viruses, so that it wouldnt compete with malwarebytes.
Malwarebytes Anti-malware is not a true anti-virus product and should not be a replacement for a real anti-virus product. For example it can't detect older viruses. Malwarebytes made the product that way on purpose since it's only meant to be a complement to an anti-virus product. Malwarebytes focus is more on newer threats, primarily what's called Zero-day and Zero-hour threats. So if you only have Malwarebytes you do not have a good protection.

*Virus Scans
What virus scans have you tried?

I suggest you try booting to Safe Mode. It will load Windows with minimum drivers required and without 3rd party products. It the problems goes away in Safe Mode, you should try the link I posted before to do a clean startup:
Troubleshoot Application Conflicts by Performing a Clean Startup

Looking at your screenshot, I believe your PC is heavily infected.

The Sality malware can according to Win32/Sality :

• Stop your security software from running
• Steal your sensitive information
• Download and run other files
• Delete security-related files from your PC
• Lower your PC security settings

Your online accounts, credit cards etc could be compromised!

You could try the MS Free Malware Removal Tool | Anti-Malware Scan Software

But I suggest you consider doing a clean install of your entire system.

Inquixitor said:

I downloaded a tool from Kasperksy that wiped all the sality viruses. I also got an antivirus.

Everything is okay now.

No clean install required.


....Im switching to mac
.-.

I wouldnt switch to mac just because you got a virus. Even mac's can get viruses. My brother is a hard core apple person as he buys old macs, refurbs them and then resells them; and in his last mac he somehow got a virus. So no, even apple stuff is not impervious to viruses. I would stick with windows.