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My computer isn't working with me. I cannot access the following sites:

www.chaoswebtech.com (without the www I can)
subdomain.chaoswebtech.com
derek.h4p.co
community.runeaid.net


It's happened before, but then after I virus scanned comp, removed 1 and then went to bed (I'm pretty sure comp was turned off during the time I went to bed) it worked again.

Should I try restarting my comp, or what?



Thanks!


EDIT:

I've restarted my computer and the sites that are still not working are:


www.chaoswebtech.com (without the www I can)
(subdomain).chaoswebtech.com


So I feel it's an issue with the domain/host maybe? Although, my friend can access it fine.

Try changing your DNS.

Try this: http://code.google.com/speed/public-dns/

Then restart your modem/router.

After leaving my computer on for a few hours, it's started to give me errors AGAIN! Really getting fed up with this.

Edit: Tried restarting computer, now I can access:
www.chaoswebtech.com - but nothing else on my list...
@aboveposter

Where would I change my DNS?

Reboot router, no luck try a reset. But first try to flush DNS: http://ftp.hosting.com/support/info/flushdns

@Bob Jansen

Currently in a hotel, just fyi. I've already flushed dns.

Open C:\Windows\System32\drivers\etc\hosts with notepad or some editor. Compare it to this:

# Copyright (c) 1993-2009 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
#
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# For example:
#
#      102.54.94.97     rhino.acme.com          # source server
#       38.25.63.10     x.acme.com              # x client host

# localhost name resolution is handled within DNS itself.
#	127.0.0.1       localhost
#	::1             localhost

If yours is any different, please post it.

# Copyright (c) 1993-2009 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
#
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# For example:
#
#      102.54.94.97     rhino.acme.com          # source server
#       38.25.63.10     x.acme.com              # x client host

# localhost name resolution is handled within DNS itself.
#	127.0.0.1       localhost
#	::1             localhost

That's mine - same thing.

When you say "can not access" what sort of error do you get? Or is it a blank page?

Oops! Google Chrome could not find *domain*

I get that.

Check if the domain is active only for you or everyone: http://www.downforeveryoneorjustme.com/

It's also possible the hotels router is blocking the websites for some reason.