I believe this error is associated with version 5.34 that has the software update checker installed in the tools menu. I have also encountered an error 29 with this version that has the software update checker. -Some users of CCleaner Professional (and its trial) will find an early version of a new feature in the Tools menu. We will fully roll out this feature to CCleaner Professional in the coming weeks
Windows 8.1 64-bit Manufacturer: Toshiba Model: VG20SQ (Socket 0) Version: 1.40 Chipset Vendor: Intel Chipset Model: Haswell Chipset Revision: 06 AMD Radeon R9 265X: GPU temps showing 511 degrees Celcius constantly.