best registry cleaner software

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Slightly off-topic but now that defrag was mentioned, is it true that Windows 7 has background defragmentation when the PC is idle?
 
Slightly off-topic but now that defrag was mentioned, is it true that Windows 7 has background defragmentation when the PC is idle?

Like Windows Vista, Windows 7 allows for scheduled defragmentation jobs. In fact, defragmentation is automatically scheduled by default, which means that most users will never have to adjust any settings in order to optimize disk performance. Well, assuming you don't turn off your computer at night, anyway. By default, the defragmenter is set to run at 1:00AM.

Windows 7 also adds the ability to defragment multiple volumes simultaneously, and the operating system will automatically disable defragmentation on any solid state disk since there's no need to defragment flash memory and continued write access to the disk could actually shorten its life.

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More than likely your C drive free space is too small. If so, then remove any unwanted software and run a diskclean.

Reg cleaners can have really bad side effects, some of which only show up some time after cleaning. In any case they won't make your machine faster.
 
More than likely your C drive free space is too small. If so, then remove any unwanted software and run a diskclean.

Reg cleaners can have really bad side effects, some of which only show up some time after cleaning. In any case they won't make your machine faster.

Bekdik is correct about the hard drive space. If you don't have sufficient space left over for the swap file, Windows will run really, really slow.
 
CCleaner all the way. Really a great piece of software! I've seen it fix slow bootup times, hangs and such. :)
 
From a systems viewpoint, registry cleaners are a waste of time, and often dangerous because they can clobber good entries. A typical NT-based (WinXP and up) registry has between half a million and a million items, so removing say one or two thousand invalid entries (left over from old software installs, for example) will not make the slightest noticeable difference in scan times.

A good analogy I read somewhere: running a registry cleaner is like asking a stranger to clean out your house and throw away what you don't need.

There is actually no such thing as "registry bloat" that affects performance. Also, provided you have enough space on disk for pagefile and hiberfil, your system is not going to be slowed down by putting more data on the disk ... it's amazing how many people think putting more stuff on the disk affects performance. A few nanosecs here and there every few secs is not feasibly measureable and certainly not humanly discernible.

There are things that can effect performance ... from bad drivers to dead links from detached network shares to loading thousands of unnecessary fonts at startup.

I can't tell you how many time I've had someone tell me their system has "Windows rot" and needs to be be reinstalled, only to find a few quick tweaks, usually on Startup, restores it to fresh-as-new.

So many "scareware" utilities are designed to make you feel "oh, good, my system's been cleaned up nicely and all the cobwebs removed". To prove the point I once wrote a little utility that did absoutely nothing but thrash the disk and show screen messages that the system was being cleaned and optimised, and everyone who ran it said they noticed a big difference in performance. Good for a chuckle, but I withdrew it when people starting asking me for copies to clean out other systems ... and no, I won't release it again because I love this industry and we don't need more junkware.
 
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Another cause of "slow machine" is a dns problem. These days most softtware assumes an always on fast connection and thus often calls home for all sorts of things, such as update availability, help files and usage stats.

If your machine has corrupt dns cache data this will slow things down to a level of unacceptability!

All OS's have ways of purging the dns cache. In windows one can run ipconfig /flushdns from cmd prompt.
 
CrapCleaner - if you weren't impressed the last time you were doing something wrong.
 
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