Erreurs sur mon ordinateur

bonjour,
je suis toujours sous windows XP
Mon anti virus "avast gratuit" me signale les erreurs suivantes
pas très douée puis je les supprimer et comment?

Cleanup

Nous avons trouvé 35 problèmes sur votre ordinateur.

18 paramètres système

Services Tuning

undefined'ERSvc
undefinediheipsvc
undefinedWebClient

System Tweaks

disable error reporting
disable fast user switching
increase disk performance by disabling last file access modification
set CPU pnority to prefer foreground apps
increased refresh rate
increased network throughput
increased network throughput

User Tweaks

hung app umeout
menu show* delay
rtait to kill app timeout
wait to kill service timeout
disable beeping on errors
disable beeping on errors
use a cleaner fine) files interface
wait to kill app timeout
wait to kill serace timeout
disable beeping on errors
disable beeping on errors
use a cleaner find files interface
disable user tracking

2.62 GB de fichiers inutiles

Libérez d'espace sur votre disque dur en supprimant les fichiers inutiles.
CD Burn Storage slze: 2.62 GB
Driver Packages siJe: 568.10 kB
Temporary Files ïize: 502.95 kB
System logs size: 405.57 kB
Software Distribution size: 214.40 kB
Récent Documents iize., 6 02 kB
Adobe Reader Mru size, 529 B
File Extensions SJZE. 0 B
Obsolète Software size. 0 g

7 applications inutiles

Browser Helper Objects
HKEY.XOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\ExplorerNBrowser Helper 0bjects'..{9421 DD08-935F-4701-A9CA-22DF90AC4EA6}
Browser Toolbars
HKEY.USERSVS-1 -5-21 • 1801674531 -1644491937-725345543-1003\5oftware\Microsoft\lnter netExplorenToolBar\WebBrowser\{2318C2B1-4965-11D4-9B18-009027A5CD4F)

Reg Run
HKEY.LOCAL_MACHINE\Sofr«are\Microsoft\Windows\CurrentVersion\Run\EEventManager HKEY^LOCAL_MACHINE'SoftvvarevMicrosort\Windorts\CurrentVersioniRun\QuickTimeTflsk
Scheduled Tasks
tindefined\At2

System Toolbars «
HKEY_LOCAL_MACHINE\Sofr«are\MicrosoftMnternet Explorer\Tool8ar\{9421 DD08-935F-47 01-A9CA-22DF90AC4EA6}
HKEY_LOCAL_MACHINE\Software\Microïoft\lnterne< ExplorervToolBar'.{2318C2B1 -4965-11 d4-9B 18-009027A5CD4F}
HKEYJJSERSvS-1 -5-21 -1801674531 -1644491937-725345543-1003\SoftwareVMicro5oft\Win dows\CurremVer5ion\Ext\Settings\{0E8A89AD-95D7-40EB-8D9D-083EF7066A01}

HKEY USERS\S-1 -5-21 -1801674531 -1644491937-725345543-1003VSofrware\Micro5ortM/Vin dows\CurrentVersion\Ext\Settings\{2318C2B1-4965-11D4-9B18-009027A5CD4F}
HKEY USERSVS-1-5-21-1801674531-1644491937-725345543-1003vSoftware^Microsoft\Win dow5"CurrentVer5ion\Ext\Settings\{9421DD08-935F-4701-A9CA-22DF90AC4EA6}
HKEY.USERS'.S-1 -5-21 -1801674531-1644491937-725345543-1003\SofrwarevMicrosoft\Wln dows\CurrentVersionvE«\Senlng=\{CC1 A175A-E45B-41ED-A30C-C9B1D7A0C02F)
HKEY_USERS\S-1 -5-21 • 1801674531 • 1644491937-725345543-1003\SoftwaresMicrosoft>Win dows'..CurrentVer5ion'.Ext\Stats'.{0E8A89AD-95D7-40EB-8D9D-083EF7066A01}
HKEY_USERS\S-1 -5-21 -1801674531 -1644491937-725345543-1003\Software\Microsoft\Win dows\CurrentVer5ionvExt\Stat5\{2318C2BI -4965-1104-9B18-009027A5CD4F}
HKEY_USERS\S-1 -5-21-1801674531-1644491937-725345543-1003vSoftwarevMicrosoft\Win dows\CurrentVer5ion\E<t-Stat5'.{9421DDC8-935F-4701-A9CA-22DF90AC4EA6}
HKEY_USERS\S-1 -5-21 -1801674531 -1644491937-725345543-1003^Software\Microsoft\Win dow5\CurrentVersion\Ex«Stats\{CC1 Al 75A-E45B-41ED-A30C-C9B1D7A0C02F}
dow5\CurrentVersionl.Ext\Stat5\{9421DD08-935F-4701-A9CA-22DF90AC4EA6}
HKEY.USERSVS-1-5-21-1801674531-1644491937-725345543-1003\Software\Microsoft\Win dovvs\CurrentVersion\ExtiStats\{CC1A175A-E45B-41EO-A30C-C9B!D7AOC02F>
HKEY_USERS\S-1-5-21-1801674531-1644491937-725345543-1003\5oftware\Microsoft\Win dow=\CurrentVersionvExt\Stat5\{D27CDB6E-AE6D-11CF-96B8-444553540000}
HKEY USER5\S-1-5-21-1801674531-1644491937-725345543-im3\Sofrvvare\Microsoft\Wln

Merci beaucoup pour votre aide
cordialement