The client's current network was working sluggishly and the Windows workstations displayed possible malware symptoms.
The network ways setup over 7 years ago and required a good overhaul.
Several Dell tower work stations and owner laptop connected to a Lan utilizing Server 2003 running on a Dell PowerEdge 2950 , MS Exchange, VoIP, and NAS via QNAP running on a Dell PowerEdge 1850. Rack containing multiple ISP cable modems to facilitate Lan and Void, switch and APC UPS.
After initial analysis I determined the workstations suffered multiple issues such as massive Outlook folders, many TSR programs along with layers of "free to download' helper programs causing the slow performance.
First backing up all files on a newly purchased WD 12 T external drive along with creating an image of the machines at current state because of the need for Zero down time in an ongoing production environment. Fortunately there was one free workstation which allowed me to "towers of Hanoi" the systems one at a time with backing up and reinstall while leaving the current rebuild workstation in working order. This allowed for complete rebuild, install and transfer of files with Zero down time.