Are you sure you contacted Microsoft Answerdesk (that’s the MS site for premium support) for assistance? We have nothing to do with that outsourced site but $400 frankly sounds exorbitant for a single incident “repair.” https://support.microsoft.com/en-us/answerdesk
What malware was found in your computer?
I assume you’re using an Asus computer?
Google search indicates ColorUService.exe is an Asus file – it should have been installed by Asus when the computer was built. http://www.freefixer.com/library/file/ColorUService.exe-137895/
See the post of HamiltonJames on July 31, 2015: http://answers.microsoft.com/en-us/insider/forum/insider_wintp-insider_store/windows-10-tech-preview-msvcr100dll-is-missing/16b50adc-e783-4123-9ba9-9a0ec9f6572e?page=2
Regards…