Should I block it?

98%
Yes, 98% block recommendation.
Possible reasons:
Multiple malware detections
Performance resource utilization

Relationships

PE structurePE file structure
Show functions
Import table
advapi32.dll
RegQueryValueExA, RegOpenKeyExA, RegFlushKey, RegSetValueExA, RegCreateKeyExA, RegDeleteValueA, RegOpenKeyW, RegCloseKey
kernel32.dll
ReleaseMutex, WaitForSingleObject, CreateMutexA, lstrcatA, lstrlenW, LockResource, LoadResource, FindResourceA, LoadLibraryExA, GetModuleFileNameA, LeaveCriticalSection, EnterCriticalSection, FreeLibrary, DeleteCriticalSection, GetCommandLineA, InitializeCriticalSection, GetCurrentThreadId, WideCharToMultiByte, DebugBreak, HeapAlloc, GetProcessHeap, CloseHandle, HeapFree, LocalFree, GetProcAddress, GetFileAttributesA, GetDriveTypeA, lstrcpynA, lstrcmpiW, OpenProcess, LoadLibraryA, LocalAlloc, CompareStringW, lstrcatW, lstrcpyW, GetLastError, CreateFileMappingA, SetLastError, DuplicateHandle, GetCurrentProcess, OpenFileMappingA, MapViewOfFile, UnmapViewOfFile, VirtualQuery, VirtualProtect, GetModuleHandleA, lstrcmpiA, IsBadReadPtr, GetVersionExA, lstrlenA, HeapReAlloc, lstrcpyA
ole32.dll
CLSIDFromString
user32.dll
GetKeyboardType, wsprintfA, SetWindowsHookExA, UnhookWindowsHookEx, CallNextHookEx
version.dll
GetFileVersionInfoSizeA, VerQueryValueA, GetFileVersionInfoA

5kreghk.dll

MindSpark Toolbar Platform IE Search Box Protector by Mindspark Interactive Network (Signed)

Remove 5kreghk.dll
Version:   1, 0, 1, 0
MD5:   b1df557546b5741a73053c37704caca4
SHA1:   d8f238165ec12f319dc727bdbf4d13a14133e855
SHA256:   bee4d1499636d508e4b81bdfe4333efd9443c301f42e6af92766662a7efea73a
Warning 3 antivirus scanners has detected malware.

What is 5kreghk.dll?

MindSpark Toolbar Platform manages the myWebSearch Toolbar, a web-browser add-on that provides search functions to the browser menu as well as a toolbar. The toolbar automatically installed with iWon, allowing user to query myWebSearch search engine.

About 5kreghk.dll (from Mindspark Interactive Network)

“The iWon Toolbar installs into your Internet browser and allows you to search the Internet with MyWebSearch® and may provide other search features as further described herein. Default Search, Addres”

DetailsDetails

File name:5kreghk.dll
Publisher:MindSpark
Product name:MindSpark Toolbar Platform IE Search Box Protector
Typical file path:C:\Program Files\iWon_5k\bar\1.bin\5kreghk.dll
Original name:t8reghk.DLL
File version:1, 0, 1, 0
Product version:2, 3, 0, 0
Size:45.55 KB (46,640 bytes)
Certificate
Issued to:Mindspark Interactive Network
Authority (CA):VeriSign
Effective date:Sunday, May 30, 2010
Expiration date:Sunday, May 6, 2012
Digital DNA
PE subsystem:Windows GUI
File packed:No
.NET CLR:No
More details

MalwareMalware detections

Based on 40+ industry antivirus scanners, 3 of them detected the following malware.
Antivirus engineEngine versionDetection
avast! 6.0.1289.0 Win32:FunWeb-K [PUP]
AVG 2014.0.3629 AdInstaller.FunWeb
VIPRE Antivirus 16734 MyWebSearch.J (v) (not malicious)

Windows OS versionsDistribution by Windows OS

OS versiondistribution
Windows 7 Ultimate N 100.00%
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