[ClownPrince]

Hello, recently my girlfriends PC has been experiencing a few problems. Firstly, and most worryingly, periodically when booted up it will instantly go to the blue screen of death and perform a 'Memory Crash Dump' or something of that ilk. It then proceeds to restart and normally works perfectly fine. Secondly Upon loading the computer always displays a flashing shield icon asking if we want to allow access to 'jucheck' or something similar. I've run virus scan recently and I thought that had sorted the blue screen problem briefly but it has since started again. Any help would be appreciated.

[blues_harp28]

Either post the Minidump files.
Look in c:\windows\minidump
ZIP them and attach them to your next post.

Right-click the minidump file, select Send To.
Then select Compressed (zipped) Folder.
Windows will compress the file and then save the new zipped file in the same location.

Or download BlueScreenView
http://www.nirsoft.net/utils/blue_screen_view.html
Download link at the bottom of the page.

Download > install.
Once it has scanned > Click on Edit > Select All > File > Save Selected Item
It will open in Notepad - or save to Notepad > Copy > Paste and Post the last 5 minidump files from the scan.

Check this link first

What is jucheck.exe?
http://www.java.com/en/download/faq/jucheck.xml

[ClownPrince]

==================================================
Dump File : 061412-25006-01.dmp
Crash Time : 14/06/2012 11:21:48
Bug Check String : PFN_LIST_CORRUPT
Bug Check Code : 0x0000004e
Parameter 1 : 00000000`0000009a
Parameter 2 : 00000000`0000a0c5
Parameter 3 : 00000000`00000000
Parameter 4 : 00000000`00000000
Caused By Driver : mfeavfk.sys
Caused By Address : mfeavfk.sys+30e30
File Description :
Product Name :
Company :
File Version :
Processor : x64
Crash Address : ntoskrnl.exe+70040
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\061412-25006-01.dmp
Processors Count : 4
Major Version : 15
Minor Version : 7600
Dump File Size : 278,248
==================================================

==================================================
Dump File : 061112-23868-01.dmp
Crash Time : 11/06/2012 12:49:38
Bug Check String : SYSTEM_SERVICE_EXCEPTION
Bug Check Code : 0x0000003b
Parameter 1 : 00000000`c0000005
Parameter 2 : fffff880`061a92d6
Parameter 3 : fffff880`088eb8d0
Parameter 4 : 00000000`00000000
Caused By Driver : mfefirek.sys
Caused By Address : mfefirek.sys+452d6
File Description :
Product Name :
Company :
File Version :
Processor : x64
Crash Address : ntoskrnl.exe+70040
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\061112-23868-01.dmp
Processors Count : 4
Major Version : 15
Minor Version : 7600
Dump File Size : 278,248
==================================================

==================================================
Dump File : 061112-21403-01.dmp
Crash Time : 11/06/2012 12:46:37
Bug Check String : SYSTEM_SERVICE_EXCEPTION
Bug Check Code : 0x0000003b
Parameter 1 : 00000000`c0000005
Parameter 2 : fffff880`060452dc
Parameter 3 : fffff880`083e68d0
Parameter 4 : 00000000`00000000
Caused By Driver : mfefirek.sys
Caused By Address : mfefirek.sys+452dc
File Description :
Product Name :
Company :
File Version :
Processor : x64
Crash Address : ntoskrnl.exe+70040
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\061112-21403-01.dmp
Processors Count : 4
Major Version : 15
Minor Version : 7600
Dump File Size : 278,248
==================================================

==================================================
Dump File : 061112-21356-01.dmp
Crash Time : 11/06/2012 11:20:28
Bug Check String : BAD_POOL_HEADER
Bug Check Code : 0x00000019
Parameter 1 : 00000000`00000020
Parameter 2 : fffffa80`016d4b70
Parameter 3 : fffffa80`016d4cb0
Parameter 4 : 00000000`04140008
Caused By Driver : rdyboost.sys
Caused By Address : rdyboost.sys+1afe6
File Description :
Product Name :
Company :
File Version :
Processor : x64
Crash Address : ntoskrnl.exe+70040
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\061112-21356-01.dmp
Processors Count : 4
Major Version : 15
Minor Version : 7600
Dump File Size : 278,248
==================================================

==================================================
Dump File : 061012-23868-01.dmp
Crash Time : 10/06/2012 20:51:38
Bug Check String : BAD_POOL_HEADER
Bug Check Code : 0x00000019
Parameter 1 : 00000000`00000020
Parameter 2 : fffffa80`016dec70
Parameter 3 : fffffa80`016decb0
Parameter 4 : 00000000`04040005
Caused By Driver : mfefirek.sys
Caused By Address : mfefirek.sys+4e636
File Description :
Product Name :
Company :
File Version :
Processor : x64
Crash Address : ntoskrnl.exe+70040
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\061012-23868-01.dmp
Processors Count : 4
Major Version : 15
Minor Version : 7600
Dump File Size : 278,248
==================================================



And also, just so i'm getting this right, Jucheck is a good thing for the computer. Its just that when we have clicked yes to the download in the past it has caused problems.

[blues_harp28]

mfeavfk.sys Windows process - What is it?
http://www.file.net/process/mfeavfk.sys.html

Related to McAfee Anti-Virus program - uninstall - re-install may solve a driver problem.

Caused By Driver : rdyboost.sys
http://systemexplorer.net/db/rdyboost.sys.html
A Microsoft file - McAfee may be causing this error.

[blues_harp28]

Stop Java update running at start up.
Start > Search box >Type
msconfig.
Untick Java

Apply > Ok > Reboot your Pc.
The System Configuration Utility box appear on retstart - saying changes have been made.
Tick the box on the lower left and then OK.

Download any needed update from their website.
http://www.java.com/en/download/help/java_update.xml