Disabling UAC Slows Vista's Bootup Time?
section: windows, for your questions: KezNews forum, 15.12.2007
Blogger Chris123NT is reporting that the LUAFV driver, which controls UAC in Vista, can cause latency issues if the controversial feature is disabled.
Apparently, once UAC is disabled, a registry tweak that disables the driver in question also needs to be applied if the user wants to have solid boot times back (improved boot times obviously vary from machine to machine). The problem occurs in both Vista RTM and the current beta build of Vista SP1 (6001.17042). This seems to me like yet another reason why it’s not a good idea to disable UAC, but I'm sure UAC haters will have a very different perspective.
It will be interesting to see how fast Microsoft will patch this problem, considering how important security is nowadays.
Note that the best boot times were achieved with UAC AND the LUAFV driver DISABLED.
Ryan’s Desktop - Vista SP1 17042
UAC Disabled w/o Tweak - 1 min 50 sec.
UAC Enabled - 1 min 30 sec.
UAC Disabled w/ tweak - 1 min 12 sec.
System configuration: 2.4 Ghz Dual Core AMD Opteron 165 , 4 GB DDR500 , Geforce 8500GT, Windows Vista Ultimate x64 SP1 RC1
Laptop - Vista RTM
UAC Enabled: 2 minutes 25 sec.
UAC Disabled w/ tweak: 1 minute 45 sec.
System Configuration: 1.6 Ghz Pentium Dual Core, 1 GB DDR2 533 , Intel Mobile Graphics 950. Windows Vista Home Premium RTM
My Test - Vista SP1 17042
UAC Enabled: 1 minute 38 sec.
UAC Disabled w/ Tweak: 1 min 04 sec.
System Configuration: XPS M1710, 2 GHZ Core2 T7200, 2 GB DDR2, 7950GTXsource:
chris123nt.com
Send link 2 friend | Permalink
MORE RELATED ARTICLES:
Dear Microsoft: Please get UAC right this time || Has Windows Vista's UAC feature failed Microsoft? || Fixing Windows Vista: Taming UAC || Microsoft Exec: UAC Designed To Annoy Users || Vistas Despised UAC Nails Rootkits, Tests Find
Comments(15)
how fast will they patch?
never is the answer...
classic issue of 50% like
uac,other 50,don't.
peace \/
uac can kiss my boot's ass
how to we fix this in the registry?? where are the entries?
i disabled uac and would see the welcome screen all the time when logging in to vista
ultimate x64 but with uac enabled, i don't see the welcome screen anymore.
hkey_local_machine\system\currentcontrolset\services\luafv
reg_dword “start” -
default value= 2 but setting it to 4 disables it completely.
much appreciated mate!
these settings can also be changed more safely using the local security policy snap in
under
local policies
security options
user account control: virtualizes
file and registry write failures to per-user locations
set to disable
when i disabled uac safely from vista manager, the only thing happened was my computer
became more faster with the aid of registry fixing tools like registry mechanic. uac is a
crap.
uhhh???
30 seconds for password display, 37 sec to vista ultimate fully loaded...
lenovo laptop 3000n100 2gig memory seagate 7200 sata uac not enabled. you mean i
disable uac and this is more fast than that ??
who bother with vista and its crap when xp is cool
xp is crap and ever was
read the comments on chris123nt 's blog. the tweak does not work. no change on boot
time.
something else i noticed is sometimes vista would hang up on start up if it couldn't
recognize the format of a cd and ejecting the disc would let it countinue.
after following the cat's advice and opening the policy manger, i actually read what the
option does:
user account control: virtualizes file and registry write
failures to per-user locations
this security setting enables the redirection of
legacy application write failures to defined locations in both the registry and file
system. this feature mitigates those applications that historically ran as administrator
and wrote runtime application data back to either %programfiles%, %windir%;
%windir%\system32 or hklm\software\....
virtualization facilitates the
running of pre-vista (legacy) applications that historically failed to run as standard
user. an administrator running only windows vista compliant applications may choose to
disable this feature as it is unnecessary.
the options are:
•
enabled: facilitates the runtime redirection of application write failures to defined user
locations for both the file system and registry.
• disabled: applications that
write data to protected locations will simply fail as they did in previous versions of
windows.
default : enabled
****i would not recommend this!****
it sounds like it could potentially screw things up
increased boot times from 40 seconds to 30
No new comments are allowed for this article.
For your questions use our KezNews Forum
patch
By rucamx PT on 16.12.2007 - 01:12