How to fix my dell E4310 from freezing while im using it?

Run a Computer Diagnostic
Run Routine System Maintenance.
Check Safe Mode for Symptoms
Update Windows
Uninstall, Reinstall, and Update Software.
Look for Multiple Anti-virus Programs
11: Check for Malware.
The computer will not resume sleep or hibernate mode.

Regards,
Peter

There are a number of reasons that the unit could be freezing up.

1. Corrupted file(s)
2. Low available disk space
3. Viruses and/or malware
4. Too many add-ons/toolbars/etc.
5. Heat build-up

Number one is the hardest to find. So start with #2. The computer needs free hard drive space to operate. If the disk is nearly full or is very fragmented, this can slow the machine to a crawl. Check for available space and if there is plenty (20GB or more), then check for fragmentation under administrative tools. If the defragmentation tool recommends optimization, allow it to perform it and see if that helps.
For viruses and possible malware, run your virus scanner. It is always a good idea to get a second opinion on such things. Malwarebytes is a free malware scanner that works very well to find adware and some things that many antivirus programs fail to detect.
Many user feel that they have to have every bell and whistle. I've seen some browsers with 7-10 different toolbar add-ons. These almost always come with some adware and always slow down the browser. Uninstall all but the most essential toolbars for the best performance. Heat is a slayer of machines. Laptops are very susceptible to heat issue since they are often placed on beds, sofas, carpets, and yes, even laptop. Many of these units draw cooling air from the bottom and exhaust it to the side. Even those that draw air from the rear and exhaust to the side will often intake large amounts of dust, grit, and lint. These can partially or completely clog the heat sink unit and cause heat buildup of the processor. This will cause the processor to work slower and can actually cause it to thermally lockup, resulting in the need to reboot. Many units can be accessed to clean with a removable cover on the bottom; others may need to be serviced by a technician to clean.