Oh Mondays. I kind of feel sorry for you. It's not your fault you're the first day after the weekend and one of the singularly most maligned days of the week.
Having said that, this is an IT blog and we have heard on any number of occasions users questioning if computers can suffer on a Monday morning too, as they often appear particularly sluggish - and there's an element of truth in it...
If you're a good boy or girl and close your computer down over the weekend, some tasks start building up in the background. Windows' updates need checking, anti-virus needs to update and scan, emails need downloading, and any other scheduled tasks need to run. That entire process can take a significant amount of time, during which the computer will run slowly.
Leaving the computer on all the time isn't really a viable option, as we briefly discussed here. So either, you have to be patient, waiting for the early processes to complete, which can take a significant amount of time. Or you could try Wake-On-Lan. WOL allows a signal to be sent remotely to a machine that effectively pushes the power button. So an hour before you arrive, you could start the power-up process, with the machine being toasty-ready for you when you arrive. There a quite a few hoops to jump through before WOL works and it may not be practical for all networks, but it's certainly worth investigating.
Aside from that, you may just need that third coffee after all.