**EXHIBIT 31.1**

 

**CERTIFICATIONPURSUANT TO18 U.S.C. SECTION 1350,AS ADOPTED PURSUANT TOSECTION 302 OF THE SARBANES-OXLEY ACT OF 2002**

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I, Harry Debes, certify that:

 

1.             Ihave reviewed this Annual Report on Form 10-K/A of Lawson Software, Inc.(the “Registrant”);

 

2.             Basedon my knowledge, this report does not contain any untrue statement of amaterial fact or omit to state a material fact necessary to make the statementsmade, in light of the circumstances under which such statements were made, notmisleading with respect to the period covered by this report;

 

3.             [omitted]

 

4.             Theregistrant’s other certifying officer and I are responsible for establishingand maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and15d-15(e)) and internal control over financial reporting (as defined inExchange Act Rules 13a-15(f) and 15d-15(f)) for the Registrant andhave:

 

(a)           Designedsuch disclosure controls and procedures, or caused such disclosure controls andprocedures to be designed under our supervision, to ensure that materialinformation relating to the Registrant, including its consolidatedsubsidiaries, is made known to us by others within those entities, particularlyduring the period in which this report is being prepared;

 

(b)           Designedsuch internal control over financial reporting, or caused such internal controlover financial reporting to be designed under our supervision, to providereasonable assurance regarding the reliability of financial reporting and thepreparation of financial statements for external purposes in accordance withgenerally accepted accounting principles;

 

(c)           Evaluatedthe effectiveness of the Registrant’s disclosure controls and procedures andpresented in this report our conclusions about the effectiveness of thedisclosure controls and procedures, as of the end of the period covered by thisreport based on such evaluation; and

 

(d)           Disclosedin this report any change in the Registrant’s internal control over financialreporting that occurred during the Registrant’s most recent fiscal quarter (theRegistrant’s fourth fiscal quarter in the case of an annual report) that hasmaterially affected, or is reasonably likely to materially affect, theRegistrant’s internal control over financial reporting.

 

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5.             Theregistrant’s other certifying officer and I have disclosed, based on our mostrecent evaluation of internal control over financial reporting, to theRegistrant’s auditors and the audit committee of the Registrant’s Board ofDirectors of:

 

(a)           Allsignificant deficiencies and material weaknesses in the design or operation ofinternal control over financial reporting which are reasonably likely toadversely affect the Registrant’s ability to record, process, summarize andreport financial information; and

 

(b)           Anyfraud, whether or not material, that involves management or other employees whohave a significant role in the Registrant’s internal control over financialreporting.

 

 
|   | /s/ Harry Debes                               |   |
|--------|-----------------------------------------------|--------|
|   | Signature                                     |
|   | Name: Harry  Debes                            |
|   | Title: President  and Chief Executive Officer |
|   | *(principal  executive officer)*              |

 

September 28, 2005

 

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