Will I have to download a new Wu. And dump the one I\'ve got on now. PPlanning on waiping the Hardrive out.

Yes.

<a href="http://www.boinc.dk/index.php?page=user_statistics&amp;project=cpdn&amp;userid=355"><img border="0" height="80" src="http://355.cpdn.sig.boinc.dk?188"></a>

I was going to start a new thread on this, but obviously I don't have to.

So there's no way to back up the current work it's done, so it can continue after reinstallation of the operating system?

I am also considering reformatting my HD, but if this is the case, I'll wait until it's finished with the current WU.

Simply make a backup of your CPDN directory. After the new installation is finished, you'll have two options:
- install again BOINC and copy the backuped directory over the new one, overriting all files
- just copy the old directory and make the shortcuts manualy
In both cases you should preserve full paths and drve letters.
<img src="http://boinc.mundayweb.com/cpdn/stats.php?userID=70">

&gt; Simply make a backup of your CPDN directory. After the new installation is
&gt; finished, you'll have two options:
&gt; - install again BOINC and copy the backuped directory over the new one,
&gt; overriting all files
&gt; - just copy the old directory and make the shortcuts manualy
&gt; In both cases you should preserve full paths and drve letters.
&gt;
This may work. However BOINC verifies that the same computer that is sent the work returns the work (due an exploit used in S@H). So if you try it will almost certainly continue processing the work when you get running again, but the odds are much lower that the server will accept the work when finished.
<br>John Keck -- BOINCing since 2002/12/08 -- <a href="http://www.boinc.dk/index.php?page=user_statistics&amp;project=cpdn&amp;userid=191"><img border="0" height="80" src="http://191.cpdn.sig.boinc.dk?188"></a>

Yes, it must work if you don't change nothing - just <b>RE</b>install.
<img src="http://boinc.mundayweb.com/cpdn/stats.php?userID=70">

&gt; Yes, it must work if you don't change nothing - just <b>RE</b>install.
&gt;
&gt;
Even with a reinstall BOINC may not reconize it as the same computer. It is a chancy situation. My luck isn't good enough to try it, but yours may be.
<br>John Keck -- BOINCing since 2002/12/08 -- <a href="http://www.boinc.dk/index.php?page=user_statistics&amp;project=cpdn&amp;userid=191"><img border="0" height="80" src="http://191.cpdn.sig.boinc.dk?188"></a>

:)
<img src="http://boinc.mundayweb.com/cpdn/stats.php?userID=70">

Will merging hosts do anything or do the computer stats have to be the same?

Oh well. I guess I'll just wait for the current WU to complete and then reformat. It's 43% done anyway, so it won't be too long now...

&gt; Oh well. I guess I'll just wait for the current WU to complete and then
&gt; reformat. It's 43% done anyway, so it won't be too long now...
&gt;
&gt;
The decision is yours, of course. I just reinstalled everything on my pc and I had no problems with the BOINC client to continue the model
<img src="http://boinc.mundayweb.com/cpdn/stats.php?userID=70">

Done the Upgrade. Nice New P4 3 GHZ HP runnin now.