System is very slow both on WIndows and Linux platforms

I suggest you perform these steps:
Run ATF-Cleaner and CCcleaner, free sharewares available on internet for download, in your system for broken registry links , clearing cache and temporary internet files etc. Also you can increase virtual memory size of your windows to speed up your PC.
To increase Virtual memory please follow the steps below.
1. Open Computer Management.
2. In the console tree, right-click Computer Management (Local), and then select Properties.
3. On the Advanced tab, under Performance, click Settings.
4. Under Virtual memory, click Change.
5. In the Drive list, click the drive that contains the paging file you want to change.
6. Under Paging file size for selected drive, click Custom size, type new paging file sizes in the Initial Size (MB) and Maximum Size (MB) boxes, and then click Set. Click OK.

Regards
David

Your System may be slow due to following reason
- Too many programs running at startup or in the background
- Data Corruption, hard disk fragmentation
- Missing Windows updates or outdated drivers
- Not enough hard drive space, too many unused programs
- Left over programs, old cached and temporary files
So Follow these steps to fix computer problem::
- Delete all the temp files
- Remove unused programs
- install latest drivers from the manufacturer site
- Install and run antispyware software
- Free up wasted space with Disk Cleanup tool
- Defragment your hard disk drive
If you are unable to perform above tasks then use a single utility tool like PC Fresher that will fix windows errors that cause of system slow