When DNS and ping Fail but nslookup Works (fix, Windows)

Spent some time recently with a Windows XP laptop that would see networks fine (although IP address acquisition via DHCP seemed slower than I’d expect), but which was unable to resolve names with DNS. This was affecting IE, Firefox,  ping, basically anything that used the built-in Winsock calls such as gethostbyname(). NSLookup, on the other hand, worked just fine.

The first thing to do when facing any computer problem is to figure out where the problem lies, so it was time for a bit of sleuthing.

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SETPWRCG.EXE - Dell Power Management component

My antivirus reported an infected file (setpwrcg.exe) this morning, with a file date of 7/19/2004.

There were a few things that struck me as odd about this:

It didn’t seem like a randomly-generated name, Most viruses/worms don’t seem to bother to set their file dates, particularly not to 5 years ago, I haven’t been […]

Sony Vaio Z505 / Z600 Hard Drive Replacement

Here are photos of the process of opening my old Sony VAIO Z505JSK laptop and upgrading the hard drive. The pictures are linked to larger versions.

The pictures on this page should apply to most Sony VAIO Z505 laptop / notebook computers, as well as to the Z600 laptops since they’re the same (just renumbered for the European market). Even where the pictures don’t match, the procedure is the same – carefully disassemble, keeping things organized. If something won’t go, look around to figure out how it might be attached or fastened, don’t just try to force it.

Your laptop was designed to be opened and serviced by technicians without damage. That means there’s a way to get into it without breaking things.

You may not know the official correct steps, but if you think you have to break something then you’re doing something wrong or have missed something. Expect tricky clips and redundancy because of the need to balance between a sturdy laptop and an easily disassembled laptop.

Continue reading Sony Vaio Z505 / Z600 Hard Drive Replacement