ExcelsiorPC

I cannot install CCleaner. I get this error every time. I email Piriform but never have received a response back. C:\Users\Tom\AppData\Local\Temp\5j9mLTDq.exe.part could not be saved, because the source file could not be read. Try again later, or contact the server administrator. OK I like the product. It started when I tried to upgrade. So I uninstalled it and tried from scratch but now I can't even have the product at all. It won't download. This is a personal PC, not a work PC