Unknown files on C drive

Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Home Premium, Service Pack 1, 64 bit
Processor: AMD Athlon(tm) II X2 240e Processor, AMD64 Family 16 Model 6 Stepping 2
Processor Count: 2
RAM: 3839 Mb
Graphics Card: ATI Radeon HD 3200 Graphics, 256 Mb
Hard Drives: C: Total - 596886 MB, Free - 9165 MB; D: Total - 13490 MB, Free - 2408 MB;
Motherboard: PEGATRON CORPORATION, JESSE
Antivirus: Norton 360 Premier Edition, Updated and Enabled

I have 100s of files like this one on C drive-what are they and can they be deleted.
{A15FEB9-8608-4701-901E-109289A2823D}