why does my computer slows down when i use youtube ?

[Magg]

what can i do ?
i have 4.00 gb

[simon]

It could be a few issues. Check your task manager and see if there are extra unwanted programs running that are not needed, and delete them, as they may be using up your computer speed.
You could also be low on RAM [running memory] which can be upgraded very easily and fairly cheap too.

[Tarek]

you need more rams

[Jerry]

Because you probally have a weak computer with like 1 G or 2 G of ram. Your computer can't handle Youtube videos being streamed to your computer while you are trying to use or open another program/ browser

[Raw_venus]

More ram would help alot here but what is your internet download speed if that is to slow your computer will seem to slow down if you are using facebook, twitter ,news stuff ect when in reality it is your internet speed. If you have another computer with more ram in the house try that one with the same web browers, same video and see what happens if the same thing happens on the better computer that is is your internet speed

[inukjuak90]

The answer is simple!

Your ''Cache'' (Temp Internet Files), Virtual Memory, and/or "PageFiling" are near-full
and cannot take anymore.  Simply delete your Cache (plus "Cookies" and "History"),
then clear your Memory with a shutdown & reboot.  Afterwards, you will freak at how
fast and non-lagging your YouTube will be.

Mozilla Firefox:
→  Tools  →  Options  →  Privacy ('key')  →  Clear Now
[x] Browsing History
[x] Cache
[x] Cookies
[x] Offline Website Data
[x] Authenticated Sessions
→  Clear Private Data Now

Google Chrome:
→  ≡  or wrench  → Tools  →  Clear browsing data
→  the beginning of time ▼
[x] Clear browsing history
[x] Empty the cache
[x] Delete cookies and other site and plug-in data
→  Clear browsing data

Internet Explorer 9 and 10:
→  Gear (icon)  →  Safety  →  Delete browsing history
[x] Temporary Internet files and website files
[x] Cookies and website data
[x] History
→  Delete

Internet Explorer 11:
→  Settings ('gear' icon on the far right side)  →  Options
(then under History)  →  "Select"
[x] Cached images
[x] Cookies
[x] Browsing History
→  Delete

Don't forget to completely shutdown & reboot afterwards.

:-)