Mark Alperin :
Calculatron :
What do you have for a processor and motherboard? (Is your rig just as old?)
Yes all Dell original I7
First of all get can of pressure air and clean inside very well, you will see how much dust you have - I do every 3-4 months and get a lot of crap out, if you never opened your PC in 6 years, you might find dead ants there as well, lol - so good cleanup first.
You would have to push air through CPU cooler fins as well.
Remove Video card and push air though all holes, you can use vacuum cleaner everywhere, but don't touch any parts with this.
Mean time list your parts, get CPUZ
http://www.cpuid.com/softwares/cpu-z.html Do not run CPUZ report, it is too long and not so helpful.
Now questions
1. What is your XPS model.
2. Open CPUZ, under CPU tab what is your Processor exact name
3. Still in CPUZ go to Mainboard tab and get your Motherboard model, BIOS version and date
4. Still in CPUZ go to Memory tab and get General type and size, next go to SPD tab and get Max Bandwith information
5. What is your hard drive type (SATA I or SATA II) and what is HDD model, so we can see the performance, or if it is difficult to find at least SATA type and size.
So, get those answers first, and start dusting your PC second.