Slow Computer svchost.exe uses 50% CPU Computer SLOW

[RadioTech]

Found this after an update and scan!

svchost.exe was using 50% CPU and lost network/internet connectivity

Seems the HOSTS file was so large it caused a dns cache overload or something.

Removed most of the entries MAD by SPYBOT and everything is back to normal

[bbnetwork]

Sounds to me more, as if you have some Spyware / Junkware or PuPs on your System, which try to contact the Internet in background.
Since some of this sites /urs might be blacklisted from Spybot, this connections cannot be resolved, but because the Adware trys again and again, this ends up in a loop.

As you removed the entrys in the Hostfile, the connections could be resolved again and the loop did end.
However, i would recommend a full Scan with Spybot to remove unwanted entrys.