Even if you have a T3 connection at work (44.736 Mbps) that is still going to be shared by everyone driving the effective bandwidth down a bit, but it will still be faster than most home fiber connections that are 10 Mbps. Do you know how fast your actual connection at home is? You might want to try a speed test both at home and at work.

Here's mine from work. When I get home tonight I'll run another so we can compare.



Oh... I forgot to address the slow down issue. How fragmented is your hard drive? Have you run an anti-malware scan?