Checking the bold items automatically causes all items in that tree to be selected, read over it to be sure but generally you can remove without worry, as far as your query earlier about the rootkit, what was there may have been labeled rootkit, spyware, malware, it really doesn't matter what it was but more that it was there and is no longer, the rest of the Gmer detections were nothing but Dr Web and Sophos related files used by those programs to hook files, normal behaviour. As other have stated pick your security combo if you wanna call it that and learn how it works, you're pretty much all set now.
Earlier I posted a little script for resetting or clearing your proxy, although you do not need it now here is another little bit you can copy and save as cleardns.bat again making sure you do not save as cleardns.bat.txt This will reset any specified IP and DNS servers which sometimes I have seen people manage to set or an infection had set which left them without internet. Again you don't need it right now but for others toolkits or anyones future use, just much quicker to run this dns and the other proxy reset before you go to cleaning a pc so you return the internet connection (if determined it is needed, everyones cleaning methods vary).
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ECHO Resetting IP Address and Subnet Mask For DHCP
netsh int ip set address name = "Local Area Connection" source = dhcp
ECHO Resetting DNS For DHCP
netsh int ip set dns name = "Local Area Connection" source = dhcp
ECHO Resetting Windows Internet Name Service (WINS) For DHCP
netsh int ip set wins name = "Local Area Connection" source = dhcp
ECHO Here are the new settings for %computername%:
netsh int ip show config
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