.pf files have NOTHING to do with .pdf files.
<quote>
Prefetch files are essentially a resource list. Any time a program is
executed, Windows XP will attempt to find a pre-existing prefetch file,
and if it's available, it will use it to make the application load up
faster. The file will also be updated after it is accessed, so that the
more an application is used, the bigger the drop in loading time (to a
point). If the application doesn't already have an associated prefetch
file, Windows XP will create one. Those files are stored in the
\%windir%\prefetch directory. One important note is that the process
depends on the Task Scheduler service. If the Task Scheduler service
isn't running, the prefetch mechanism isn't used and the files won't be
read or updated. <quote>
http://www.filext.com/detaillist.php?extdetail=pf
What Prefetching does...
[[Windows XP Professional monitors the files that are used when the
computer starts and when you start applications. By monitoring these
files, Windows XP Professional can prefetch them. Prefetching data is the
process whereby data that is expected to be requested is read ahead into
the cache. Prefetching boot files and applications decreases the time
needed to start Windows XP Professional and start applications.
Prefetching is further improved if the files are located next to each
other on the outer edge of the disk. Windows XP Professional optimizes the
location of boot files and applications when the computer is idle. The
optimization occurs in the background and lasts only a minute or two; you
might hear the hard disk being accessed when optimization occurs. After
the initial optimization takes place, subsequent optimization occurs, at
most, every three days.
When you run the Disk Defragmenter tools that are included with Windows XP
Professional, they can perform any optimization updates that are scheduled
to take place during the next idle period. The Disk Defragmenter tools do
not disturb the existing layout of optimized boot files and applications.
Note
Computers running Windows XP Home Edition also prefetch and optimize boot
files and applications.]]
Optimizing Startup Times by Using Defragmentation Tools
http://www.microsoft.com/resources/documentation/Windows/XP/all/reskit/en-us/prkd_tro_uutk.asp
Benchmarking on Windows XP
http://www.microsoft.com/whdc/system/sysperf/benchmark.mspx
Logical Prefetcher in WinXP
http://snakefoot.fateback.com/tweak/winnt/tweak.html#MFT_LOG
Performance Enhancements in Windows® XP
http://windowsxp.devx.com/articles/perfen/default.asp
Prefetch
From …
Windows XP: Kernel Improvements Create a More Robust, Powerful, and
Scalable OS
Mark Russinovich and David Solomon
http://msdn.microsoft.com/msdnmag/issues/01/12/XPKernel/default.aspx
Optimizing Startup Times by Using Defragmentation Tools
http://www.microsoft.com/resources/documentation/Windows/XP/all/reskit/en-us/prkd_tro_uutk.asp
Use XP's Prefetch feature to improve system performance
http://search.techrepublic.com.com/...refetch+feature+to+improve+system+performance
Windows XP Performance
http://www.microsoft.com/technet/prodtechnol/winxppro/evaluate/xpperf.mspx
--
Hope this helps. Let us know.
Wes
MS-MVP Windows Shell/User
In
nass said:
So can you or dave explain for me what can help the OP in this matter,
C:\WIN...ADOBEUPDATER.EXE-1AB51BCE.pf, if it doesn't belong to Adobe PDF
and I can't see Adobe will create a profile and call it something else
rather than PDF.
And nobody asked if the OP have Adobe or not?.
HTH.
Let us know.
Regards,
nass