I have VS 2013 and Microsoft Windows 8.1 The issue appeared at the ending of last week. Without any updating or important changing, when I do somethings in VS, disk usage reaches 100%. For example, when I click on "Check In" button in the "Team Explorer" window, disk usage raises up to 100%. Sometimes by a simple right-click in text editor this problems happens. I googled about 100% disk usage problem but there are some things about this problem on windows 8.1 but on my computer, all applications are running without any problem, just VS2013 has a "full disk usage" problem.
Some information about my system:
OS Name: Microsoft Windows 8.1 Pro
OS Version: 6.3.9600 N/A Build 9600
System Type: x64-based PC
Processor(s): 1 Processor(s) Installed. Intel64 Family 6 Model 60 Stepping 3GenuineIntel ~3500 Mhz
Total Physical Memory: 8,131 MB
Available Physical Memory: 3,836 MB
Virtual Memory: Max Size: 10,947 MB
Virtual Memory: Available: 5,275 MB
Virtual Memory: In Use: 5,672 MB
Page File Location(s): C:\pagefile.sys
An SSD may can solve this... Are you sure this is caused by visual studio? when I was using Windows 8.1, the Windows Defender get to 100% disk usage from time to time. If you're sure it occurs when you use Visual Studio, you can try to repair it using the installer. Hope these would help you.