Verified answer

Download isdone.dll and Unarc.dll and extract them in c:\windows\system32\ folder.

http://www.opendll.com/index.php?file-download=isd...

http://www.opendll.com/index.php?file-download=una...

David

Unarc.dll error and isdone.dll error's occur due to variety of reasons .

Step 1.First Force Recheck : Many times the file itself is not downloaded completely . If you are using torrents , please check the Force Recheck Option(Right Click->Force Recheck on torrents list) and see if it is 100% downloaded and if not-> complete the download .

Step2:Provided Step 1 is complete : Unzipping of files needs high RAM(best 8 GB) and HDD(best 1 TB) :Reason is once Windows starts there are lot of processes going on simultaneously which require RAM ,your RAM may be 8 GB and it might show its using max 2 or 3 GB but still it can show error since we do not the internal memory usage and allocation the Operating System does - recommended change :

Control Panel\System and Security\System ->click Advanced System Settings ->in system properties ->advanced tab -> performance section - > click settings -> in performance options click advanced -> in virtual section click change - > set virtual memory upper and lower limits as 12253 MB .

step 3: Check for HDD space .

step 4: Get the unarc.dll (not isdone.dll-if you want download it also and put it in respective system32 and syswow64 folders prior to installation)

step 5: Recommended Installation of Software again and again only after 15- 20 minutes of system start up .All system processes would have already run and system would be dormant and no other processes would be running while installation .Entire focus of the system would be on the process of installation.Do not restart the System to install . Instead use CCleaner again and again but don't restart.

step 6: if the file is correctly downloaded - switch off your antivirus and start installation process .

step 7:Still error code 1,7,14 etc then do step 1 and check which files example data1 or data2 which is not downloaded completely .

100 % times it is the file not downloaded completely or installation when antivirus is on or installation during system start up .

Plz help guys i have isdone.dll unarc.dll error code 7 my minimum 4gb ram and 2 gb graphic card and ghz is 2.6 my assassins creed rouge game not starting setup plz plz helpppppp

Unrar.dll

i dont know wheather these step going to work or not but after i frorce recheck there is 0.1% of download not completed its insane it showed 99.9% anyways i dowonloade that now hope it works

i also tried all these steps but it occurs still while installing ac 4

It depends..