how can I block other people from using my computer when i'm not around?
448078
if it uses windows xp pro you can lock it.. to change ur password u go to start then to the picture next to ur name and click it then change password... on my laptop i can set a code u have to put in when u turn the computer on so even before windows boots u have to enter a code...
376196
Use firewall and specify a port on internet connection to be blocked.\nIf you are using a router, you can configure it to block or allow certain port to the internet too.
389272
You can't do it exactly as you describe, but there is a way to block people.\n\nThe easiet thing to do is to block access to the entire computer.  Do this by creating user names and passwords in control panel.  This way only certain people are allowed to use the computer.\n\nYou can use the above method to block some users from running certain programs, but it is more complex.  In Windows Explorer (not IE), you can set security options on files and folders.  On my computer, IE is in the directory "C:&#92;Program Files&#92;Internet Explorer".  You can set the security options to allow access only to certain users.\n\nIf you do the file security method, you should create a security group called something like "IeUsers" and allow that group access to the directory.  You then give certain users access to the program by making their user ID members of the "IeUsers" group.\n\nI don't recall if XP home allows detailed security settings.  If not, you will have to be satisfied with blocking them completely from the computer.  XP professional does allow the detailed security control.
561679
do a search on your computer  FIREWALL and enter it and disable it
646989
Get an application based firewall like zonealarm. \nhttp://www.zonelabs.com/
1172896
parental lock (download one from www.download.com )\n\nget a firewall (just in case)\n\nspyware remover, cookie remover, virus remover (you'll need it)\n\nyou can get all these at download.com
1000817
get yahoo (yim) u can use it there without other person having it
15216
Consider parental control software. e.g. CyberPatrol, Net Nanny. I use McAfee's Internet Security Suite.
1145410
It's called ping+packetsniffer.  If he runs a packetsniffer while he chats with you, he can get your ip address, once he has that running a ping of that ip will tell him if your computer is connected to the internet at any time.  The easiest way to block this is to get a firewall that supports "privacy mode" Zone Alarm is a free firewall that offers much better functionality than Microsofts integrated firewall and a simple checkbox masks your ip from others.
59245
In many cases, u gan just add a shortcut for them or move the existing shortcut to all users. If it doesn't work, u may have to uninstall and reinstall.\n\nAs to blocking, it can be done with either policy or file security.
43506
If you're looking to keep yourself or others on your network from going to sites at different hours your best bet is to use a firewall.  A Linksys router's interface, for instance, includes a section called Access Restriction where you can block by website address, including certain times of the day or days of the week.  I have also heard of a new software on the market for parents to control their children's online time, but I hear reports of computer-savvy kids being able to work their way around it.  If you do use a firewall already, check what its settings let you do and make sure you have set a secure password on it which your children would not be able to guess.
333258
If it is the Windows Firewall, go to Control Panel, and go to Windows Firewall.  You can turn it off there, but beware, don't keep it off for long.
462453
Start limiting there access to the computer, not good idea for kids to be to surf the net unsupervised
856902
You can't.  It has nothing to do with your computer.  It is all done through router configurations and block internet addresses.  Sorry you're stuck
670652
Yes. When I used a shared computer I installed something called 1st Security Agent. It lets you set up a whole load of restrictions on users such as what programs they are and are not allowed to use, what they're allowed to install etc. I suggest you search for it in Google- it comes with a free trial.\n\nHope this Helps!
645349
Try those programs>\nWindows Defender from Microsoft.com (for XP only)\nSpyBot S&D\nAvast! Pro\nand/or ZoneAlarm
856983
go back to tools but go down to internet options then privacy at the bottom of the box you can disable the windows popup blocker.. (((not recommended though)))