Everything started when I tried to open a project in Visual Studio 2013 and it freezed right after this was opened. Later, I found out that parts of Windows 8 aren't working either, like the firewall page in my control panel.
I had already seen this issue once before, but then I could solve it by goint to settings and check for updates. However, now this page doesn't do anything either (loading icon keeps rotating forever).
I have the feeling that there's a connection between these issues, like a common web service they all cannot access. Is there such a thing?
Of course, my network connection is up and running and a reboot didn't help.
Update
If found out that my second hard drive is not accessible anymore. Windows runs on an SSD, which is still working, but the pagefile is located on the HDD.
If I try to start up Windows after detaching the HDD, I get an error message. The reason for this might be that the pagefile.sys is located on the HDD. Unfortunately, I cannot open "System" inside my control panel; is there another way to reconfigure pagefile location?
Update 2
Running chkdsk results in no found errors, and I can even access the HDD in quesion via command line. It's just the explorer that freezes when I try to access it.